Pen sleeve



FIG. 1 is a perspective view of a pen sleeve showing my new design;

FIG. 2 is a front side view thereof;

FIG. 3 is a rear side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is an enlarged bottom plan view thereof; and,

FIG. 7 is an enlarged top plan view thereof.

The broken line in FIG. 6 is included to illustrate an unclaimed part ofthe pen and forms no part of the claimed design.

CLAIM The ornamental design for a pen sleeve, as shown and described.